// add a projectile
public void AddProjectile(Missile _p)
{
projectiles.Add(_p);
addShapes(_p.Shapes);
}
// remove an explosion
/*public void RemoveExplosion(Explosion _e) {
* explosions.Remove(_e);
* removeShapes(_e.Shapes);
* }*/
// advance game state by amount of time
public void Advance(double dt)
{
// advance each projectile
foreach (Missile _p in projectiles)
{
//Debug.WriteLine(string.Format("{0} advanced", _p));
_p.Advance(dt);
}
// advance each explosion
foreach (Explosion _e in explosions)
{
_e.Advance(dt);
}
// collision checks
foreach (Missile _p in projectiles)
{
// only check if not destroyed
// and if projectile is capable of collision
if (!_p.Destroyed && _p.Collidable)
{
// check against each explosion
foreach (Explosion _e in explosions)
{
// check if projectile collided
if (_p.Collided(_e))
{
// break inner loop
// destroyed check below will handle cleanup
break;
}
}
}
}
// not using foreach/list.RemoveAll(_p => _p.destroyed), etc
// because would be too inoptimal for what is needed
// list to gather shapes to remove
List <Shape> _toRemove = new List <Shape>();
// check for destroyed projectiles
// loop backwards to handle index shifting from RemoveAt
for (int _i = projectiles.Count - 1; _i >= 0; --_i)
{
Missile _p = projectiles[_i];
if (_p.Destroyed)
{
projectiles.RemoveAt(_i);
_toRemove.AddRange(_p.Shapes);
// add explosion object from projectile if exists
Explosion _e = _p.ExplosionObj;
if (_e != null)
{
AddExplosion(_e);
}
// if was an IPBM, decrement incomingMissilesUp
if (_p is IPBMissle)
{
//--incomingMissilesUp;
// shouldn't go negative but just in case
incomingMissilesUp = Math.Max(incomingMissilesUp - 1, 0);
// if destroyed reason collided, add score
if (_p.DestroyedType == MissileDestroyedType.Collided)
{
int _scoreAdd = settings.ScoreEnemyMissile * scoreMultiplier;
score += _scoreAdd;
remainingScore -= _scoreAdd;
}
}
}
}
// check for inactive explosions
for (int _i = explosions.Count - 1; _i >= 0; --_i)
{
Explosion _e = explosions[_i];
if (!_e.Active)
{
explosions.RemoveAt(_i);
_toRemove.Add(_e.ExplosionShape);
}
}
// check for destroyed targets
for (int _i = targets.Count - 1; _i >= 0; --_i)
{
ITarget _t = targets[_i];
if (_t.Destroyed)
{
targets.RemoveAt(_i);
_toRemove.Add(_t.DisplayShape);
}
}
// call remove shapes event
removeShapes(_toRemove);
// advance game time
gameTime += dt;
// check level
CheckLevel(dt);
}
// tell city is has been impacted by projectile
public void Impacted(Missile _p)
{
// just set destroyed
destroyed = true;
}
